I get that predictive deja vu - prime example was I had a very clear colour dream in which I was sat facing a gaming console - I was playing a game on it - the wall behind was bright red, the console was set up on a wire mesh shelf, the floor was black and white checkered pattern. I looked to my left and there was a guy sat playing a console, I didn't recognise him. turned the other way and there was another guy playing the other console. There were other people in the room.
about 6 months later I was sat in a texan church's youth cafe playing on a playstation. the room was exactly as i described. I turned to my left and it was Josh, on my right was Jonty. They were brothers who I had never met until I went on that missionary trip to texas, they had come on it too.
I've had other occations which are just as strange like predicting a moment in my maths class months before - I'd even seen the equations on the board, seen who I was sat next to and who my teacher was, and as before, the room was exactly as i'd dreamt. but I'd never had a lesson in that new room when I dreampt about it.
I know its very common but I think it would be worth discussing in some depth.
why does it happen? and how?